 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.dialogs;

 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.ui.IFileEditorMapping;

 /**
  * A content provider for displaying of <code>IFileEditorMapping</code>
  * objects in viewers.
  * <p>
  * This class has a singleton instance,
  * <code>FileEditorMappingContentProvider.INSTANCE</code>,
  * which can be used any place this kind of content provider is needed.
  * </p>
  *
  * @see org.eclipse.jface.viewers.IContentProvider
  */
 public class FileEditorMappingContentProvider implements
         IStructuredContentProvider {

     /**
      * Singleton instance accessor.
      */
     public final static FileEditorMappingContentProvider INSTANCE = new FileEditorMappingContentProvider();

     /**
      * Creates an instance of this class. The private visibility of this
      * constructor ensures that this class is only usable as a singleton.
      */
     private FileEditorMappingContentProvider() {
         super();
     }

     /* (non-Javadoc)
      * Method declared on IContentProvider.
      */
     public void dispose() {
     }

     /* (non-Javadoc)
      * Method declared on IStructuredContentProvider.
      */
     public Object [] getElements(Object element) {
         IFileEditorMapping[] array = (IFileEditorMapping[]) element;
         return array == null ? new Object [0] : array;
     }

     /* (non-Javadoc)
      * Method declared on IContentProvider.
      */
     public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
     }
 }

